/**
 * pagination分页插件
 * @version 1.1.2
 * @author mss
 * @modify mo
 * @url http://www.jq22.com/yanshi5697
 * @E-mail 251445460@qq.com
 *
 * @调用方法
 * $(selector).pagination();
 * 
 * @更新日志
 * 2016-07-25：修复click重复事件
 */
;
(function($, window, document, undefined) {

    //配置参数
    var defaults = {
        totalData: 0, //数据总条数
        showData: 0, //每页显示的条数
        pageCount: 9, //总页数,默认为9
        current: 1, //当前第几页
        prevCls: 'prev', //上一页class
        nextCls: 'next', //下一页class
        prevContent: '<', //上一页内容
        nextContent: '>', //下一页内容
        pageClass: 'btn btn-default', //每一页的class
        activeCls: 'active', //当前页选中状态
        coping: false, //首页和尾页
        homePage: '', //首页节点内容
        endPage: '', //尾页节点内容
        count: 3, //当前页前后分页个数
        jump: false, //跳转到指定页数
        jumpIptCls: 'jump-ipt', //文本框内容
        jumpBtnCls: 'jump-btn', //跳转按钮
        jumpBtn: '跳转', //跳转按钮文本
        callback: function() {} //回调
    };

    var Pagination = function(element, options) {
        //全局变量
        var opts = options, //配置
            current, //当前页
            $document = $(document),
            $obj = $(element); //容器

        /**
         * 设置总页数
         * @param int page 页码
         * @return opts.pageCount 总页数配置
         */
        this.setTotalPage = function(page) {
            return opts.pageCount = page;
        };

        /**
         * 获取总页数
         * @return int p 总页数
         */
        this.getTotalPage = function() {
            var p = opts.totalData || opts.showData ? Math.ceil(parseInt(opts.totalData) / opts.showData) : opts.pageCount;
            return p;
        };

        //获取当前页
        this.getCurrent = function() {
            return current;
        };

        /**
         * 填充数据
         * @param int index 页码
         */
        this.filling = function(index) {
            var html = '';
            current = index || opts.current; //当前页码
            var pageCount = this.getTotalPage();
            if (current > 1) { //上一页
                html += '<a href="javascript:;" class="' + opts.pageClass + ' ' + opts.prevCls + '">' + opts.prevContent + '</a>';
            } else {
                $obj.find('.' + opts.prevCls) && $obj.find('.' + opts.prevCls).remove();
            }
            if (current >= opts.count * 2 && current != 1 && pageCount != opts.count) {
                var home = opts.coping && opts.homePage ? opts.homePage : '1';
                html += opts.coping ? '<a href="javascript:;" class="' + opts.pageClass + '" data-page="1">' + home + '</a><span class="' + opts.pageClass + '">...</span>' : '';
            }
            var start = current - opts.count,
                end = current + opts.count;
            ((start > 1 && current < opts.count) || current == 1) && end++;
            (current > pageCount - opts.count && current >= pageCount) && start++;
            for (; start <= end; start++) {
                if (start <= pageCount && start >= 1) {
                    if (start != current) {
                        html += '<a href="javascript:;" class="' + opts.pageClass + '" data-page="' + start + '">' + start + '</a>';
                    } else {
                        html += '<span class="' + opts.pageClass + ' ' + opts.activeCls + '">' + start + '</span>';
                    }
                }
            }
            if (current + opts.count < pageCount && current >= 1 && pageCount > opts.count) {
                var end = opts.coping && opts.endPage ? opts.endPage : pageCount;
                html += opts.coping ? '<span class="' + opts.pageClass +'">...</span><a class="' + opts.pageClass + '" href="javascript:;" data-page="' + pageCount + '">' + end + '</a>' : '';
            }
            if (current < pageCount) { //下一页
                html += '<a href="javascript:;" class="' + opts.pageClass + ' ' + opts.nextCls + '">' + opts.nextContent + '</a>'
            } else {
                $obj.find('.' + opts.nextCls) && $obj.find('.' + opts.nextCls).remove();
            }

            html += opts.jump ? '<input type="text" class="' + opts.jumpIptCls + '"><a href="javascript:;" class="' + opts.pageClass + ' ' + opts.jumpBtnCls + '">' + opts.jumpBtn + '</a>' : '';

            $obj.empty().html(html);
        };

        //绑定事件
        this.eventBind = function() {
            var self = this;
            var pageCount = this.getTotalPage(); //总页数
            $obj.off().on('click', 'a', function() {
                if ($(this).hasClass(opts.nextCls)) {
                    var index = parseInt($obj.find('.' + opts.activeCls).text()) + 1;
                } else if ($(this).hasClass(opts.prevCls)) {
                    var index = parseInt($obj.find('.' + opts.activeCls).text()) - 1;
                } else if ($(this).hasClass(opts.jumpBtnCls)) {
                    if ($obj.find('.' + opts.jumpIptCls).val() !== '') {
                        var index = parseInt($obj.find('.' + opts.jumpIptCls).val());
                    } else {
                        return;
                    }
                } else {
                    var index = parseInt($(this).data('page'));
                }
                self.filling(index);
                typeof opts.callback === 'function' && opts.callback(self);
            });
            //输入跳转的页码
            $obj.on('input propertychange', '.' + opts.jumpIptCls, function() {
                var $this = $(this);
                var val = $this.val();
                var reg = /[^\d]/g;
                if (reg.test(val)) {
                    $this.val(val.replace(reg, ''));
                }
                (parseInt(val) > pageCount) && $this.val(pageCount);
                if (parseInt(val) === 0) { //最小值为1
                    $this.val(1);
                }
            });
            //回车跳转指定页码
            $document.keydown(function(e) {
                var self = this;
                if (e.keyCode == 13 && $obj.find('.' + opts.jumpIptCls).val()) {
                    var index = parseInt($obj.find('.' + opts.jumpIptCls).val());
                    self.filling(index);
                    typeof opts.callback === 'function' && opts.callback(self);
                }
            });
        };

        //初始化
        this.init = function() {
            this.filling(opts.current);
            this.eventBind();
        };
        this.init();
    };

    $.fn.pagination = function(parameter, callback) {
        if (typeof parameter == 'function') { //重载
            callback = parameter;
            parameter = {};
        } else {
            parameter = parameter || {};
            callback = callback || function() {};
        }
        var options = $.extend({}, defaults, parameter);
        return this.each(function() {
            var pagination = new Pagination(this, options);
            callback(pagination);
        });
    };

})(jQuery, window, document);